Homework Answers
Solution: When nichrome wire is dipped in NaCl solution and put on flame then orange yellow colour would be obtained due to excitation of electron of Na and when these electron jump back to the ground state then it release radiation energy in visible region.
On the other hand when nichrome wire is dipped in KCl solution and put on flame then faint purple or lilac colour would be obtained due to similar reason, relaxation of excited electron.
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Question 1 3 pts Solution Investigation Question: Instructions: If you were in lab, you would use...
Exercise 1. Lab Preparation. Q1) 25.00 ml of 0.10 M COCI, solution is needed for this...
Exercise 1. Lab Preparation. Q1) 25.00 ml of 0.10 M COCI, solution is needed for this experiment. Show all calculations associated with the creation of this solution. 25.00mil IL 10.10m Coch 100oment Timor coche 0.32g Colla Q2) Describe how to make 25.00 mL of 0.10 M CoCl, solution. Be specific. Prepare the solution. Add 0.32g of Collz in 25.com, of water to preport 0.70M Collz Solomon 93) Determine the amount of 1.00 M HCl stock solution needed to form 100...
Why is it necessary to perform the reaction of Fe with S8 solution under a fume...
Why is it necessary to perform the reaction of Fe with S8
solution under a fume
REAC 422 Saying Chemical Reaction and Writing Chemica ls 1111 Pre-Laboratory Assignment 1. Briefly answer the following questions about some of the procedures you will be using in this experiment. (1) Why would it be dangerous to perform Part 1 of the procedure of this experiment close to a lighted Bunsen burner? (4) Although the crucible is covered while heating in Part Ill of...
CHEMICALS AND EQUIPMENT Bunsen burner Striker or matches Wire loops -10 mL of 1 M NaCl...
CHEMICALS AND EQUIPMENT Bunsen burner Striker or matches Wire loops -10 mL of 1 M NaCl -10 mL of 1 M KI -10 mL of 1 M Nal -10 mL of 1 M KCI -10 mL of 1 M CaCl, -10 mL of 1 M CuSO -10 mL of 1 M BaCl . -10 mL of 1 M Borax Safety Concerns Always wear safety goggles. Keep your hand away from the flame by holding the bottom of the wire loop...
Please answer both!!! Question 1 1 pts How many millimoles of tert-butyl chloride will be present...
Please answer both!!!
Question 1 1 pts How many millimoles of tert-butyl chloride will be present in each reaction? 3,000 Question 2 1 pts How many millimoles of hydroxide ion will be present in each reaction? 7.000 Page < 3 > of 4 - ZOOM GENERAL PROCEDURE 1. Obtain a 5 ml graduated pipet with a bulb, a thermometer, and a stopwatch. Obtain twelve test tubes in a rack from the cart in the laboratory. 2. Pipet 3 ml (5...
I could really use help for question 1 and 2! Thank you in advance :) MATERIALS...
I could really use help for question 1 and 2! Thank you in
advance :)
MATERIALS AND EQUIPMENT . 1 - pH probe w/LabQuest . 1 - 100 ml beaker . 1 - stir bar • 1 - stir rod • 3 - medium beaker • 2 - 30 mL beaker CHEMICALS • sodium carbonate, NaHCO3 • 0,1 M hydrochloric acid, HCI • 0.85% lactic acid • dry ice • ammonium chloride, NHACI assigned acid assigned conjugate base • 6...
Question A 20.0 mL sample solution contains unknown amount of bromide ion (Br). To this solution...
Question
A 20.0 mL sample solution contains unknown amount of bromide ion (Br). To this solution was added the solution that contains plenty of AgNO3. AgBr precipitates were formed. The precipitate were filtered and measured to be is 0.6964 g. What is the molarity of bromide ion in the original sample solution? The molar mass of Br = 80.0 g; the molar mass of AgBr = 188 g. (Solution) AgNO, is soluble and thus exists Ag+ ion and NO3-ion. Ag+...
It is confirmed by forming a strawberry red precipitate, NicaH,N2O2), with an organic reagent, dimethylglyoxime. 5c...
It is confirmed by forming a strawberry red precipitate, NicaH,N2O2), with an organic reagent, dimethylglyoxime. 5c Detection of Magnesium Magnesium is confirmed by dissolving the hydroxide with acid and then re-precipitating it in the presence of an organic compound called Magnesium reagent. The presence of Mg is indicated by formation of "blue Mg (aa) 20H (ag) Mg reagent Mg (OH)2 (s) First, you will analyze a known that contains all 10 cations. Record on your report PROCEDURE sheet the reagents...
Question 3 1 pts A student performs part C of the substitution lab. The student is...
Question 3 1 pts A student performs part C of the substitution lab. The student is using 0.50 Mbutyl bromine in ethanol, 0.50 M potassium hydroxide in ethanol and 0.15 M HCl for the reactions. If the student took a 20 mL sample of the solution and titrated it with HCI, what would be the [OH-] from Data Set C of the student data (shown below? Report answers with 4 places past the decimal...for example 0.000158, would be 0.0002 Data...
answer questions #1-7 and I'll send more information on question #7. We were unable to transcribe...
answer questions #1-7 and I'll send more information
on question #7.
We were unable to transcribe this imagesolution of a Mixture by Distillation 4 BACKGROUND s one of the most common methods of purifyinga ery simple method: a liquid is brought to a boil, the liquid becomes a gas the gas a liquid. It is a collected returns to the liquid state and the liquid acquire sufficient e from the liquid phase and enter into the s vapor phase Evaporation...
just answer the first question but question is needed to solve In a follow-up experiment, 19.494-mL of an aqueous...
just answer the first question but question is needed to
solve
In a follow-up experiment, 19.494-mL of an aqueous solution of potassium hydroxide was prepared so that it contained exactly the same concentration of hydroxide ion from Question 10 This solution was mixed into a reaction vessel that contained an aqueous solution of a Group IIA-chloride chemical compound. At the end of the reaction, it was discovered that your solution was perfectly neutral.(Assume the hydroxide containing product precipitated out completely...
Exercise 1. Lab Preparation. Q1) 25.00 ml of 0.10 M COCI, solution is needed for this experiment. Show all calculations associated with the creation of this solution. 25.00mil IL 10.10m Coch 100oment Timor coche 0.32g Colla Q2) Describe how to make 25.00 mL of 0.10 M CoCl, solution. Be specific. Prepare the solution. Add 0.32g of Collz in 25.com, of water to preport 0.70M Collz Solomon 93) Determine the amount of 1.00 M HCl stock solution needed to form 100...
Why is it necessary to perform the reaction of Fe with S8
solution under a fume
REAC 422 Saying Chemical Reaction and Writing Chemica ls 1111 Pre-Laboratory Assignment 1. Briefly answer the following questions about some of the procedures you will be using in this experiment. (1) Why would it be dangerous to perform Part 1 of the procedure of this experiment close to a lighted Bunsen burner? (4) Although the crucible is covered while heating in Part Ill of...
CHEMICALS AND EQUIPMENT Bunsen burner Striker or matches Wire loops -10 mL of 1 M NaCl -10 mL of 1 M KI -10 mL of 1 M Nal -10 mL of 1 M KCI -10 mL of 1 M CaCl, -10 mL of 1 M CuSO -10 mL of 1 M BaCl . -10 mL of 1 M Borax Safety Concerns Always wear safety goggles. Keep your hand away from the flame by holding the bottom of the wire loop...
Please answer both!!!
Question 1 1 pts How many millimoles of tert-butyl chloride will be present in each reaction? 3,000 Question 2 1 pts How many millimoles of hydroxide ion will be present in each reaction? 7.000 Page < 3 > of 4 - ZOOM GENERAL PROCEDURE 1. Obtain a 5 ml graduated pipet with a bulb, a thermometer, and a stopwatch. Obtain twelve test tubes in a rack from the cart in the laboratory. 2. Pipet 3 ml (5...
I could really use help for question 1 and 2! Thank you in
advance :)
MATERIALS AND EQUIPMENT . 1 - pH probe w/LabQuest . 1 - 100 ml beaker . 1 - stir bar • 1 - stir rod • 3 - medium beaker • 2 - 30 mL beaker CHEMICALS • sodium carbonate, NaHCO3 • 0,1 M hydrochloric acid, HCI • 0.85% lactic acid • dry ice • ammonium chloride, NHACI assigned acid assigned conjugate base • 6...
Question
A 20.0 mL sample solution contains unknown amount of bromide ion (Br). To this solution was added the solution that contains plenty of AgNO3. AgBr precipitates were formed. The precipitate were filtered and measured to be is 0.6964 g. What is the molarity of bromide ion in the original sample solution? The molar mass of Br = 80.0 g; the molar mass of AgBr = 188 g. (Solution) AgNO, is soluble and thus exists Ag+ ion and NO3-ion. Ag+...
It is confirmed by forming a strawberry red precipitate, NicaH,N2O2), with an organic reagent, dimethylglyoxime. 5c Detection of Magnesium Magnesium is confirmed by dissolving the hydroxide with acid and then re-precipitating it in the presence of an organic compound called Magnesium reagent. The presence of Mg is indicated by formation of "blue Mg (aa) 20H (ag) Mg reagent Mg (OH)2 (s) First, you will analyze a known that contains all 10 cations. Record on your report PROCEDURE sheet the reagents...
Question 3 1 pts A student performs part C of the substitution lab. The student is using 0.50 Mbutyl bromine in ethanol, 0.50 M potassium hydroxide in ethanol and 0.15 M HCl for the reactions. If the student took a 20 mL sample of the solution and titrated it with HCI, what would be the [OH-] from Data Set C of the student data (shown below? Report answers with 4 places past the decimal...for example 0.000158, would be 0.0002 Data...
answer questions #1-7 and I'll send more information
on question #7.
We were unable to transcribe this imagesolution of a Mixture by Distillation 4 BACKGROUND s one of the most common methods of purifyinga ery simple method: a liquid is brought to a boil, the liquid becomes a gas the gas a liquid. It is a collected returns to the liquid state and the liquid acquire sufficient e from the liquid phase and enter into the s vapor phase Evaporation...
just answer the first question but question is needed to
solve
In a follow-up experiment, 19.494-mL of an aqueous solution of potassium hydroxide was prepared so that it contained exactly the same concentration of hydroxide ion from Question 10 This solution was mixed into a reaction vessel that contained an aqueous solution of a Group IIA-chloride chemical compound. At the end of the reaction, it was discovered that your solution was perfectly neutral.(Assume the hydroxide containing product precipitated out completely...
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